Bug fix:

If a lemma (a disjunction) has a "false" literal in it, it can be ignored, but a "true" literal really should stay

1 files changed, 2 insertions, 5 deletions

diff --git a/src/proof/proof_manager.cpp b/src/proof/proof_manager.cpp
index e5e00f117..65dbb644d 100644
--- a/src/proof/proof_manager.cpp
+++ b/src/proof/proof_manager.cpp
@@ -336,11 +336,8 @@ std::set<Node> ProofManager::satClauseToNodeSet(prop::SatClause* clause) {
     prop::SatLiteral lit = (*clause)[i];
     Node node = getCnfProof()->getAtom(lit.getSatVariable());
     Expr atom = node.toExpr();
-    if (atom.isConst()) {
-      Assert (atom == utils::mkTrue());
-      continue;
-    }
-    result.insert(lit.isNegated() ? node.notNode() : node);
+    if (atom != utils::mkTrue())
+      result.insert(lit.isNegated() ? node.notNode() : node);
   }
 
   return result;